Over a six-hour period on April 21, 2015, NASA's Solar Dyanmics Observatory (SDO) observed a wing-like prominence eruption. SDO views the sun in various wavelegnths of the extreme ultravoilet, including 171 (shown in gold) and 304 (shown in orange) angstroms.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 184.108.40.206.0